Run the PageDefrag tool and look at the number of fragments of all the listed files. If the number of fragments of each file listed is 1 then you do not have to defragment. If the number of fragments are more than 1, then you can defragment. Run PageDefrag and select Defragment at next boot and click OK as shown in the picture below :

After clicking OK, restart your computer and PageDefrag will start to defragment the system files as shown in the picture below. Once it has finished, system will boot into Windows.

If you want, you can choose to defragment the PageFile at every boot. Just select Defragment every boot in the main PageDefrag window as shown in the above picture.